Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/76623
Title: Synthesis of low-temperature calcium sulfoaluminate-belite cements from industrial wastes and their hydration : comparative studies between lignite fly ash and bottom ash
Authors: Rungchet, A
Poon, CS 
Chindaprasirt, P
Pimraksa, K
Keywords: Calcium-sulfoaluminate-belite cement
Hydrothermal-calcination method
Lignite fly ash
Bottom ash
Hydration
Issue Date: 2017
Publisher: Pergamon Press
Source: Cement and concrete composites, 2017, v. 83, p. 10-19 How to cite?
Journal: Cement and concrete composites 
Abstract: The aim of this research was to study the production of calcium sulfoaluminate-belite (CŜAB) cement from industrial waste materials via hydrothermal-calcination process. Lignite fly ash and bottom ash were used as starting materials for comparison. Other waste materials viz., Al-rich sludge and flue gas desulfurization gypsum were also key players in raw mixes for the synthesis of CŜAB cement. For lignite fly ash as a starting material, mixed phases between ye'elimite and larnite were obtained, whereas for lignite bottom ash as starting material, only ye'elimite was obtained The hydration reaction was studied in terms of heat evolution, setting time, compressive strength and hydration product formation with various gypsum contents. The results showed a rapid formation of ettringite as a main hydration product mixed with calcium silicate hydrate, monosulfate and strätlingite phases as minority, with a fast final setting time of 24–26 min and high early compressive strength of 16.0 and 18.0 MPa in 1 day for CŜAB cements made of fly ash and bottom ash, respectively.
URI: http://hdl.handle.net/10397/76623
ISSN: 0958-9465
EISSN: 1873-393X
DOI: 10.1016/j.cemconcomp.2017.06.013
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